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Power output: 500 watts @ 4 ohms, 250 watts @ 8 ohms
Inputs: One ¼” Input jack with Active/Passive switch
Channel One:
Bright: +5dB >4kHz shelving
Treble: +/- 13dB @ 4kHz shelving
High Mid: +/- 14dB @ 800Hz peaking
Low Mid: +/- 14dB @ 400Hz peaking
Bass: +/- 18dB @ 40Hz shelving
Deep: +6dB <100Hz shelving
Channel Two:
Contour: broad range mid scoop @ 1kHz (ccw=max scoop (~20dB) cw=flat)
Treble: + 6dB/- 10dB @ 4kHz shelving
Mid: + 4dB/- 10dB @ 600Hz peaking
Bass: + 8dB/- 6dB @ 40Hz shelving
Deep: +6dB <100Hz shelving
Presence: + 6dB/-20dB >4kHz shelving
FX Loop: Series/Parallel; Send pot is Push/Pull for Line or Instrument level; Return pot is Push/Pull for Parallel or Series operation.
Outputs: Two Neutrik Speakon and two ¼” speaker outputs, XLR balanced D.I. out with Pre and Post EQ switch, Tuner output.
Size: 2 rack spaces, 17″ W X 3.5″ H X 10″ D
Weight: 18 lbs.
RMS Power Output: 300-Watts x 2/900 (mono-bridged @ 8 Ohms)
RMS Power Output: 490-Watts x 2/1200 (mono-bridged @ 4 Ohms)
RMS Power Output (2 Ohms): 600-Watts x 2
Preamp: Tubes (3 x 12AX7)
Power Amp: Solid State
Tone Controls: 3-Band
Mid Tone Control: 5-Position
Graphic EQ: Yes, 9-Band
Ultra Low/High Boosts: Yes
Balanced Line Out: Yes x 2 Pre/Post with Level
Effects Loop: Yes x 2
Preamp Out/Power Amp In: Yes x 2
Dimensions (W x H x D inches): 19 x 5.6 x 15.5
Weight: 39.5 Pounds
Specification:
All-tube bass amplifier.
Power 300W RMS @ 4ohm and 2 Ohm.
Preamp with 3 x 12AX7 tubes.
Driver based on 1x 12AX7 and 2 x 12AU7.
Power amp with 6x 6550.
Normal and Bright inputs.
Bass/ Mid/ Treble + 5-way Mid switch.
6 band graphic equalizer.
Ultra Low and Ultra Hi filters.
Effects Loop.
XLR DI output with Pre/Post switch.
LF Drivers: 1 x 18” Cast
Voice Coil: 4”
Magnet Weight (each): 109 oz
RMS Power Handling: 500-Watts
Frequency Response (-3dB): 35Hz-2kHz
Usable Low Frequency (-10dB): 28Hz
Nominal Impedance: 4-Ohms
Sensitivity: 97dB
Maximum SPL: 130dB
Dimensions (W x H x D inches): 24 x 25 x 22.5
Weight: 86 Pounds
LF Drivers: 4 x 10”
Voice Coil: 2”
Magnet Weight (each): 30 oz
HF Drivers: Horn/Driver
Voice Coil: 1”
Magnet Weight (each): 8 oz
RMS Power Handling: 500-Watts
Frequency Response (-3dB): 48Hz-18kHz
Usable Low Frequency (-10dB): 28Hz
Nominal Impedance: 4-Ohms
Sensitivity: 98dB
Maximum SPL: 125dB
Dimensions (W x H x D inches): 24 x 30 x 19
Shipping Weight: 110 Pounds
Handling Weight: 85 Pounds
LF Drivers: 8 x 10”
Voice Coil: 2”
Magnet Weight (each): 30 oz
RMS Power Handling: 2 x 400-Watts (Stereo)
RMS Power Handling: 800-Watts (Mono)
Frequency Response (-3dB): 58Hz-5kHz
Usable Low Frequency (-10dB): 40Hz
Nominal Impedance: 2 x 8-Ohms (Stereo)
Nominal Impedance: 4-Ohms (Mono)
Sensitivity: 100dB
Maximum SPL: 130dB
Dimensions (W x H x D inches): 26 x 48 x 16
Shipping Weight: 165 Pounds
Handling Weight: 140 Pounds
INPUT: impedance 500 Kohm, max. voltage 15 Vpp
BALANCED INPUT (XLR): impedance 100 Kohm, max. voltage 25 Vpp
EFFECT RETURN: impedance 33 Kohm, max. voltage 10 Vpp
GAIN: -60 dB to +23 dB range
MASTER VOLUME
LINE OUT LEVEL
GROUND LIFT (switch on rear panel)
PRE/POST EQ (switch on rear panel)
WEIGHT: 5.07 lbs / 2.3 Kg
OUTPUT POWER: 500W RMS @ 4 ohms / 300W RMS @ 8 ohms
POWER REQUIREMENT:100/120V; 230V; 240V – 50/60Hz (Voltage is factory preset according to region of sale)
Minimum ohm load for all Markbass heads is 4 ohms.
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